The FASTPAM access method (like DIV) uses its own parameter list, rather than the TU FCB for passing parameters.
This FPAMSRV(I) parameter list includes - among others - the
LARGE_FILE=*FORBIDDEN/*ALLOWED operands for the “Open files” function.
The operand controls whether the processing of large files is permitted.
The default value *FORBIDDEN prevents uncontrolled access to large files. This function is represented in the parameter list in a bit field which is preset with B'0' (ï *FORBIDDEN). The presetting with the default value *FORBIDDEN is therefore guaranteed for programs that were compiled in versions earlier than OSD-BC V5.0.
Indicating whether large files are permitted
The FPAMSRV macro, with the OPEN function and the LARGE-FILE operand, indicates whether large files are permitted.
Operation | Operands |
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LARGE_FILE
specifies whether the file to be opened may become a “large” file that can exceed 32 GB in size.
Default setting: LARGE_FILE = *FORBIDDEN
With the form MF=L, only direct specification is permitted.
= *FORBIDDEN
Default setting: The file may not become a “large file”.
= *ALLOWED
The file may become a “large file”.
= adr / (r)
The address of a field that is 1 byte in length and contains the value for LARGE_FILE or the register that contains the value.
An additional return code displays information about the execution of the macro with regard to large files:
X'cc' | X'bb' | X'aaaa' | Explanation |
X'00' | X'01' | X'0015' | The function was not performed. |